Hydrostatic pump or engine with infinitely variable debit or impulse

ABSTRACT

The invention refers to a hydrostatic pump or engine with infinitely variable debit or impulse of the rotative type, constituted by an external and fixed body ( 1 ) of cylindrical shape, and whose symmetry axis coincides with the axis ( 4 ) of the rotor ( 3 ); the named body is laterally fixed to two flat covers forming a case. A second body, or stator ( 2 ), with a cylindrical interior peripherical surface, and whose symmetry axis is in a coincident or parallel position with the rotor axis, is interposed at intervals between the rotor and the first body, being formed cameras ( 7 ) and ( 9 ), for the fluid circulation, and cameras ( 6 ) and ( 8 ), for the compensation and balance of forces acting in the interior and in the exterior of each stator side. Performing by means of rods ( 14 ), ( 15 ) the stator decentralization, in the direction (A) or in the inverse direction (B), one gets the progressive variation of the volume of the named cameras and consequently the variation of the debits or of the impulses in an infinitely variable way. Associating a pump sending fluid with an engine receiving the same fluid and this returning to the pump in continuous circulation, performing the stator decentralization, in one direction or in the inverse direction, in the pump or in the engine, or in both simultaneously, one gets a transmission of force or of speed, one or the other of infinitely variable value.

DESCRIPTION TECHNICAL DOMAIN

The present invention seeks to solve the difficulties one has to face inthe application of hydrostatic pumps or engines with infinitely variabledebit or impulse so that this type of equipment may be simpler in itsfunctioning and in its making, resulting from it a lower cost on the onehand and the ability to widen its application to infinitely variabletransmissions of speed and impulse.

PREVIOUS TECHNIQUE

The current technique of these equipments is based on an identicaltechnique to the functioning of the alternative explosion engines usingpistons, cylinders and valves.

The variation of the amplitude of depressions and impulses is obtainedby varying the amplitude of the pistons course; for example, when thecylinders are grouped in a circle and in a parallel way, the variationof the amplitude of the pistons course is obtained by the variableinclination of a plate which acts in the pistons by their base, and withtheir return by means of a spring.

A great inconvience of this process is the great force that is necessaryto be applied so that one may obtain the variation of the plateamplitude, which depends on the work pressure of the pistons.

EXPLANATION OF THE INVENTION

One goal of the invention is to solve this problem, i.e., to obtain asimple system of variation of amplitude whose command does not requirethe application of a great strength and, therefore, it is not dependentof the work pressures of the fluid. The basic idea of the invention is,in a pump or engine of the rotative type, to interpose, between thefixed stator and the rotor, a second stator, whose symmetry axis getsdecentralized in relation to the rotor axis, and to obtain the balanceof the pressures or of the depressions on each side of the stator.

The figure of the drawing represents in section a pump or an engine ofthe rotative type in which the movable and radial elements of the rotorare, for example, cylinders (5).

DESCRIPTION OF THE INVENTION

One of the ways of execution and functioning of the invention isdescribed as follows, with reference to the drawings which representonly one way of performance.

As is verified in the drawing, this example of a pump or an engine withinfinitely variable debit or impulse is constituted by a first externaland fixed body whose internal surface is of cylindrical shape and whosesymmetry axis coincides with the axis (4) of the shaft of the rotor (3).This shaft is supported in two flat and parallel covers, adjusted to therotor faces and fixed in the faces of the first body, forming a casewhich closes the rotor at intervals.

A second body or stator (2) with a cylindrical interior periphericalsurface and the partially cylindrical external one, and frontallyadjusted to the above mentioned covers, is interposed in the namedspace, formed between the rotor and the internal part of the first body.

The stator moves in a direction (A) or in the inverse direction (B),i.e., it is decentralized in relation to the rotor axis and gets supportand slides through the first body by means of two flat contacts situatedin a parallel way and in diametrically opposite position, and in whichthe flat surface of each stator contact is adjusted to the flat surfaceof the contiguous contact of the external body (10), (11).

From the interposition of the stator between the external body and therotor is derived the formation of intervailic spaces, external to thestator (6), (9) and internal to the stator (7), (8), which are alsobounded by the lateral covers so as to form cameras. The cameras (7),(8), which encircle the rotor communicate with the fluid circuit bymeans of openings (12), (13), adjusted and contiguous to the slidingcontacts so as to permit the fluid circulation.

The contiguous cameras to each side of the stator (6) and (7), (8) and(9), communicate between themselves by slots or orifices so as to permitthe intercommunication and the fluid compensation, consequent to thevariable decentralizations of the named stator, i.e., to their removingin a direction or in the inverse direction in relation to the rotor.

As a result of the reported intercommunication and fluid compensation,the balance of the acting pressures on each side of the stator ispractically constant. Consequently it is of reduced value the force tobe transmitted to the rod (14), (15), in order to be obtained thecorresponding and easy decentralization of the stator.

The progressive decentralization of the stator produces a progressivevariation of the cameras volume (7), (8), and without alteration of thedirection of the rotor rotation, the direction of the fluid circulationresults reversible according to the stator removal to one side (A) or tothe opposite side (B) of the named rotor.

The value of the debit or impulse of the fluid which, in a given extentof decentralization is produced by the rotor rotation, corresponds tothe difference between the volumetric values of cameras (7) and (8)internal to the stator, being this difference infinitely variable. Ithas zero value, when the stator is centered with the rotor, and amaximum value, when the stator is in the limit of the decentralization.

The constructive elements that were described and their operative wayare identical in their application either as pump or as engine.

If the stator decentralization is performed, for example, in thedirection indicated in (A) by means of the rod (15) the camera volume(7) increases and the camera volume (8) decreases; if the rotor rotationis in the direction (C), the fluid will circulate in the direction (E);if the rotor rotation is in the direction (D), the fluid will circulatein the inverse direction (F); if the decentralization is performed inthe direction indicated in (B), the functioning relations will beidentical but performed in the inverse direction of those of (A).

Associating a pump sending fluid with a receiving engine of the samefluid, and this returning to the pump in continual circulation: if onedecanters the stator of the pump or of the engine, or bothsimultaneously, one will obtain a transmission of force and speed ofprogressive values, or infinitely variable.

This equipment has application in the movement of fluids and machines,transmission of force and speed, etc.

What is claimed is:
 1. A hydrostatic pump, comprising an external bodyhaving an inner surface and an axis of symmetry an impeller rotor, saidimpeller rotor having a shaft, said shaft coinciding with said axis ofsymmetry, two parallel covers supporting said shaft, said covers fixedto said external body, a stator located between said rotor and saidexternal body inner surface to form external chambers between saidstator and said external body inner surface and internal chambers insidesaid stator, orifices in said stator for balancing the pressure in saidinternal and external chambers.
 2. The hydrostatic pump of claim 1,further comprising rods controlling variation of amplitude ofdecentralization of said stator.
 3. The hydrostatic pump of claim 1,wherein said stator has a cylindrical inner periphery and an externalperiphery formed by two half cylindrical surfaces.
 4. The hydrostaticpump of claim 2 wherein said orifices allow fluid between said internaland external chambers in response to the variation of amplitude ofdecentralization of the stator.
 5. The hydrostatic pump of claim 2,wherein said rods extend through the external body and have rectilinearmovement.
 6. The hydrostatic pump of claim 1, wherein said external bodyinner surface is cylindrical.